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To add or subtract fractions, they must have the same denominator. If they do not, make the least common multiple of all of the denominators the new denominator. After adding or subtracting, reduce your answer.

When giving the fractions like denominators, whatever number you multiply the old denominator of a fraction by, you must also multiply it by the numerator.

Sources:

See Also:
Least Common Denominators

www.mathsisfun.com/fractions_addition.html

There are 3 Simple Steps to add

www.khanacademy.org/math/arithmetic/fraction-arithmetic/arith-review-add-sub-fractions/e/adding_fractions

Practice

www.khanacademy.org/math/in-seventh-grade-math/rational-numbers/copy-of-addition-subtraction-fractions/v/adding-fractions-with-unlike-denominators

Adding and subtracting fractions · How to add ... Example of

www.calculatorsoup.com/calculators/math/adding-fractions-calculator.php

Calculator for

www.ixl.com/math/grade-5/add-fractions-with-unlike-denominators

Fun math practice! Improve your skills with free problems in 'Add

www.mathplayground.com/fractions_add.html

Math Computation Practice:

www.mathplayground.com/howto_fractions_diffden.html

Math video teaches students how to add

www.abcya.com/adding_fractions.htm

www.mathworksheets4kids.com/fraction-addition.php